Re: pcb offset into uarea

[David Laight <david%l8s.co.uk@localhost>]

On Wed, Feb 19, 2014 at 09:14:05AM -0800, Matt Thomas wrote:
> 
> For the aarch64 port, the only thing in the PCB is the fpu register set.
> Everything else is in mdlwp.  Now the context switch code can ignore
> the PCB entirely.  I've been thinking of doing something similar for
> other ports i maintain.

Makes sense.

That would remove a rather pointless indirection for those fields as well.
On amd64 and i386 the pcb is slightly over 64 bytes (+fpu save area).
So moving those into the lwp won't make much difference.
It isn't as though anyone has considered swapping uareas for a while.

        David

-- 
David Laight: david%l8s.co.uk@localhost